Impeller



FIG. 1 is a perspective view of an impeller according to a first embodiment of our design;

FIG. 2 is another perspective view thereof;

FIG. 3 is a side view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a perspective view of an impeller according to a second embodiment of our design;

FIG. 7 is another perspective view thereof; and,

FIG. 8 is a cross-sectional view along line 8-8 of FIG. 7. 

The ornamental design for an impeller, as shown. 